package com.wss.common.wechat.util.qrcode;


import com.google.zxing.BarcodeFormat;
import com.google.zxing.EncodeHintType;
import com.google.zxing.MultiFormatWriter;
import com.google.zxing.WriterException;
import com.google.zxing.common.BitMatrix;
import com.google.zxing.qrcode.decoder.ErrorCorrectionLevel;

import javax.imageio.ImageIO;
import java.awt.*;
import java.awt.image.BufferedImage;
import java.io.ByteArrayOutputStream;
import java.io.File;
import java.io.FileInputStream;
import java.util.Date;
import java.util.HashMap;
import java.util.Map;

/**
 * @author 赵飞
 * @version V1.0
 * @Title:
 * @Package com.evermotion.common.wechat.util
 * @Description:
 * @date 2016/8/7
 */
public class ZXingCode {
	private static final int QRCOLOR = 0xFF000000;   //默认是黑色
	private static final int BGWHITE = 0xFFFFFFFF;   //背景颜色


	public static void main(String[] args) throws WriterException {
		String logoPath = "E:/emendSysImg/qrt_img_dir/qr_logo/dulux_logo.jpg";  //TODO
		String qrPath = "E:/emendSysImg/qrt_img_dir/qrCode.png";
		try {
			getLogoQRCode(qrPath, logoPath, "跳转到百度的二维码");
		} catch (Exception e) {
			e.printStackTrace();
		}
	}


	/**
	 * 生成带logo的二维码图片 * * @param qrPic * @param logoPic
	 */
	public static String getLogoQRCode(String qrPath, String logoPath, String productName) {
// String filePath = request.getSession().getServletContext().getRealPath("/") + "resources/images/logoImages/llhlogo.png";
		//filePath是二维码logo的路径，但是实际中我们是放在项目的某个路径下面的，所以路径用上面的，把下面的注释就好
		//String content = qrUrl;
		try {
			ZXingCode zp = new ZXingCode();
			BufferedImage bim = ImageIO.read(new FileInputStream(qrPath));
			//BufferedImage bim = zp.getQR_CODEBufferedImage(content, BarcodeFormat.QR_CODE, 400, 400, zp.getDecodeHintType());
			return zp.addLogo_QRCode(bim, new File(logoPath), new LogoConfig(), productName);
		} catch (Exception e) {
			e.printStackTrace();
		}
		return null;
	}

	/**
	 * 给二维码图片添加Logo * * @param qrPic * @param logoPic
	 */
	public String addLogo_QRCode(BufferedImage bim, File logoPic, LogoConfig logoConfig, String productName) {
		try {
			/** * 读取二维码图片，并构建绘图对象 */
			BufferedImage image = bim;
			Graphics2D g = image.createGraphics();

			/** * 读取Logo图片 */
			BufferedImage logo = ImageIO.read(logoPic);
			/** * 设置logo的大小,本人设置为二维码图片的20%,因为过大会盖掉二维码 */
			int widthLogo = logo.getWidth(null) > image.getWidth() * 3 / 10 ? (image.getWidth() * 3 / 10) : logo.getWidth(null),
					heightLogo = logo.getHeight(null) > image.getHeight() * 3 / 10 ? (image.getHeight() * 3 / 10) : logo.getWidth(null);

			/** * logo放在中心 */
			int x = (image.getWidth() - widthLogo) / 2;
			int y = (image.getHeight() - heightLogo) / 2;
			/** * logo放在右下角 * int x = (image.getWidth() - widthLogo); * int y = (image.getHeight() - heightLogo); */

			//开始绘制图片
			g.drawImage(logo, x, y, widthLogo, heightLogo, null);
// g.drawRoundRect(x, y, widthLogo, heightLogo, 15, 15);
// g.setStroke(new BasicStroke(logoConfig.getBorder()));
// g.setColor(logoConfig.getBorderColor());
// g.drawRect(x, y, widthLogo, heightLogo);
			g.dispose();

            /*//把商品名称添加上去，商品名称不要太长哦，这里最多支持两行。太长就会自动截取啦
			if (productName != null && !productName.equals("")) {
                //新的图片，把带logo的二维码下面加上文字
                BufferedImage outImage = new BufferedImage(400, 445, BufferedImage.TYPE_4BYTE_ABGR);
                Graphics2D outg = outImage.createGraphics();
                //画二维码到新的面板
                outg.drawImage(image, 0, 0, image.getWidth(), image.getHeight(), null);
                //画文字到新的面板
                outg.setColor(Color.BLACK);
                outg.setFont(new Font("宋体",Font.BOLD,30)); //字体、字型、字号
                int strWidth = outg.getFontMetrics().stringWidth(productName);
                if (strWidth > 399) {
// //长度过长就截取前面部分
// outg.drawString(productName, 0, image.getHeight() + (outImage.getHeight() - image.getHeight())/2 + 5 ); //画文字
                    //长度过长就换行
                    String productName1 = productName.substring(0, productName.length()/2);
                    String productName2 = productName.substring(productName.length()/2, productName.length());
                    int strWidth1 = outg.getFontMetrics().stringWidth(productName1);
                    int strWidth2 = outg.getFontMetrics().stringWidth(productName2);
                    outg.drawString(productName1, 200  - strWidth1/2, image.getHeight() + (outImage.getHeight() - image.getHeight())/2 + 12 );
                    BufferedImage outImage2 = new BufferedImage(400, 485, BufferedImage.TYPE_4BYTE_ABGR);
                    Graphics2D outg2 = outImage2.createGraphics();
                    outg2.drawImage(outImage, 0, 0, outImage.getWidth(), outImage.getHeight(), null);
                    outg2.setColor(Color.BLACK);
                    outg2.setFont(new Font("宋体",Font.BOLD,30)); //字体、字型、字号
                    outg2.drawString(productName2, 200  - strWidth2/2, outImage.getHeight() + (outImage2.getHeight() - outImage.getHeight())/2 + 5 );
                    outg2.dispose();
                    outImage2.flush();
                    outImage = outImage2;
                }else {
                    outg.drawString(productName, 200  - strWidth/2 , image.getHeight() + (outImage.getHeight() - image.getHeight())/2 + 12 ); //画文字
                }
                outg.dispose();
                outImage.flush();
                image = outImage;
            }*/
			logo.flush();
			image.flush();
			ByteArrayOutputStream baos = new ByteArrayOutputStream();
			baos.flush();
			ImageIO.write(image, "png", baos);

			//二维码生成的路径，但是实际项目中，我们是把这生成的二维码显示到界面上的，因此下面的折行代码可以注释掉
			//可以看到这个方法最终返回的是这个二维码的imageBase64字符串
			//前端用 <img src="data:image/png;base64,${imageBase64QRCode}"/> 其中${imageBase64QRCode}对应二维码的imageBase64字符串

			ImageIO.write(image, "png", new File("E:/emendSysImg/qrt_img_dir/TDC-" + new Date().getTime() + "test.png")); //TODO

			String imageBase64QRCode = Base64.byteArrayToBase64(baos.toByteArray());
			baos.close();
			return imageBase64QRCode;
		} catch (Exception e) {
			e.printStackTrace();
		}
		return null;
	}


	/**
	 * 构建初始化二维码 * * @param bm * @return
	 */
	public BufferedImage fileToBufferedImage(BitMatrix bm) {
		BufferedImage image = null;
		try {
			int w = bm.getWidth(), h = bm.getHeight();
			image = new BufferedImage(w, h, BufferedImage.TYPE_INT_RGB);

			for (int x = 0; x < w; x++) {
				for (int y = 0; y < h; y++) {
					image.setRGB(x, y, bm.get(x, y) ? 0xFF000000 : 0xFFCCDDEE);
				}
			}

		} catch (Exception e) {
			e.printStackTrace();
		}
		return image;
	}

	/**
	 * 生成二维码bufferedImage图片
	 *
	 * @param content       编码内容
	 * @param barcodeFormat 编码类型
	 * @param width         * 图片宽度
	 * @param height        * 图片高度
	 * @param hints         * 设置参数
	 * @return
	 */
	public BufferedImage getQR_CODEBufferedImage(String content, BarcodeFormat barcodeFormat, int width, int height, Map<EncodeHintType, ?> hints) {
		MultiFormatWriter multiFormatWriter = null;
		BitMatrix bm = null;
		BufferedImage image = null;
		try {
			multiFormatWriter = new MultiFormatWriter();
			// 参数顺序分别为：编码内容，编码类型，生成图片宽度，生成图片高度，设置参数
			bm = multiFormatWriter.encode(content, barcodeFormat, width, height, hints);
			int w = bm.getWidth();
			int h = bm.getHeight();
			image = new BufferedImage(w, h, BufferedImage.TYPE_INT_RGB);

			// 开始利用二维码数据创建Bitmap图片，分别设为黑（0xFFFFFFFF）白（0xFF000000）两色
			for (int x = 0; x < w; x++) {
				for (int y = 0; y < h; y++) {
					image.setRGB(x, y, bm.get(x, y) ? QRCOLOR : BGWHITE);
				}
			}
		} catch (WriterException e) {
			e.printStackTrace();
		}
		return image;
	}

	/**
	 * 设置二维码的格式参数 * * @return
	 */
	public Map<EncodeHintType, Object> getDecodeHintType() {
		// 用于设置QR二维码参数
		Map<EncodeHintType, Object> hints = new HashMap<EncodeHintType, Object>();
		// 设置QR二维码的纠错级别（H为最高级别）具体级别信息
		hints.put(EncodeHintType.ERROR_CORRECTION, ErrorCorrectionLevel.H);
		// 设置编码方式
		hints.put(EncodeHintType.CHARACTER_SET, "utf-8");
		hints.put(EncodeHintType.MARGIN, 0);
		hints.put(EncodeHintType.MAX_SIZE, 350);
		hints.put(EncodeHintType.MIN_SIZE, 100);

		return hints;
	}
}

class LogoConfig {
	// logo默认边框颜色
	public static final Color DEFAULT_BORDERCOLOR = Color.WHITE;
	// logo默认边框宽度
	public static final int DEFAULT_BORDER = 2;
	// logo大小默认为照片的1/5
	public static final int DEFAULT_LOGOPART = 5;

	private final int border = DEFAULT_BORDER;
	private final Color borderColor;
	private final int logoPart;

	/**
	 * Creates a default config with on color
	 * {@link #} and off color
	 * {@link #}, generating normal black-on-white barcodes.
	 */
	public LogoConfig() {
		this(DEFAULT_BORDERCOLOR, DEFAULT_LOGOPART);
	}

	public LogoConfig(Color borderColor, int logoPart) {
		this.borderColor = borderColor;
		this.logoPart = logoPart;
	}

	public Color getBorderColor() {
		return borderColor;
	}

	public int getBorder() {
		return border;
	}

	public int getLogoPart() {
		return logoPart;
	}
}
